ICM7217_01 Datasheet, PDF (2/20 Pages) Intersil Corporation – 4-Digit LED Display, Programmable Up/Down Counter

ICM7217
Pinouts
ICM7217 (CERDIP)
COMMON ANODE
TOP VIEW
CARRY/BORROW 1
ZERO 2
EQUAL 3
BCD I/O 8s 4
BCD I/O 4s 5
BCD I/O 2s 6
BCD I/O 1s 7
COUNT INPUT 8
STORE 9
UP/DOWN 10
LOAD REGISTER/OFF 11
LOAD COUNTER/I/O OFF 12
SCAN 13
RESET 14
ICM7217
ICM7217B
28 D1
27 D2
26 D3
25 D4
24 V_DD
23 DISPLAY CONT.
22 SEG g
21 SEG b
20 V_SS
19 SEG e
18 SEG f
17 SEG d
16 SEG a
15 SEG c
ICM7217 (PDIP)
COMMON CATHODE
TOP VIEW
CARRY/BORROW 1
ZERO 2
EQUAL 3
BCD I/O 8s 4
BCD I/O 4s 5
BCD I/O 2s 6
BCD I/O 1s 7
COUNT INPUT 8
STORE 9
UP/DOWN 10
LOAD REGISTER/OFF 11
LOAD COUNTER/I/O OFF 12
SCAN 13
RESET 14
ICM7217A
ICM7217C
28 SEG d
27 SEG b
26 SEG f
25 SEG c
24 V_DD
23 SEG a
22 SEG e
21 SEG g
20 DISPLAY CONT.
19 V_SS
18 D1
17 D2
16 D3
15 D4
Functional Block Diagram
ZERO
V_DD
UP/DN
COUNT
V_SS
4
4
4
4
T.G.
T.G.
T.G.
T.G.
1
2
3
4
4
4
4
4
D1
D2
D3
D4
10
1
RS
10
2
RS
10
3
RS
10
4
RS
ZERO
ZERO
ZERO
ZERO
4
U/D
U/D
U/D
U/D
CL CARRY
CL CARRY
CL CARRY
CL CARRY
4
4 ^T.G.
4
4
3 ^T.G.
4
4
2 ^T.G.
4
4
1 ^T.G.
4
4 D1 3 D2 2 D3 1 D4
REG.
REG.
REG.
REG.
4
COMP.
4
COMP.
4
COMP.
4
COMP.
4
4
4
4
CARRY/BARROW
8s
4s
BDC
2s
I/O
1s
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
T.G.
4
LATCH
MUX
4
L.R.
L.C.
RESET
MUX. I/O
AND
DISPLAY
CONTROL
LOGIC
SEGMENT DECODER
DISPLAY BLANK + OFF
SEGMENT DRIVERS
(7)
DIGIT DRIVERS
(4)
ABCDE FG
D4 D3 D2 D1
4
4
DIGIT MUX
BCD I/O INPUTS
COM. ANODE: PULL DOWN
COM. CATHODE: PULL UP
MUX.
OSCILLATOR
EQUAL
V_DD
STORE
V_DD
RESET
V_DD
V_SS
LOAD
COUNTER
V_DD
LOAD
V_{SS REGISTER}
V_DD
V_SS
DISPLAY
CONTROL
SCAN
2